Stitching machine anvil



March 28, 1933. H, R BLISS Er AL STITCHING MACHINE ANVILV Filed Aug. 16, 1930 HERBERT R. Buss HOWARD @ALLEN INVENTORS.

ATTORNEYS,V

APatented Mar. 28, 1933 UNITED STATES PATENT oFFlcE HERBERT R. BLISS AND HOWARD G. ALLEN, F NIAGARA. FALLS, NEW YORK, AS- SIGNORS TO H. R. BLISS COMPANY, IN C., OFNIAGARA FALLS, NEW YORK, A CORPO- BATIFON OF NEW YORK sTIrcHTNG MACHINE ANVIL Application led August 16, 1930. Serial N'o. 475,780.

This invention relates to stitching machines and it is concerned principally with an anvil shaped for clinching the stitches underneath the overlapping flaps of a container which may be loaded, and furthermore, which may advantageously be employed with a portable stitching machine.

It isthe purpose of the invention to provide an anvil so constructed that it may be inserted between overlapping aps of a container, and which has a portion arranged to underlie the innermost flap to clinch stitches driven through the two overlapping flaps.

The anvil is constructed so that the stitches can be placed relatively close together, and

in this regard shipping regulations require certain spacing of the stitches. The anvil, due to its formation, may be readily removed even though the stitches are thus closely placed, and in so removing it may be swung around with respect to' the container. The center of the swing may be substantially that of the last stitch, and the anvil will readily move out from between the two overlapping flaps in the yspace between the two adjacent stitches.

Fig. 1 is a side elevational view of a portable stitching machine which is equipped with the anvil.

Fig. 2 is an end view thereof illustrating the anvil in place between overlapping iaps of a container.

Fig. 3 is a view illustrating substantially the position of the anvil in use.

Fig. 4 is a View illustrating the manipulation ofthe anvil with respect to the container Y throwingl mechanism and power means such member 5.

as an electric motor 4 and a movable switch The details of the mechanism of this portable stitcher head are disclosed in Letters Patent of the United States No. 1,855,178, granted April 26, 1932, and need not be gone into further in the present case.

An anvil is carried by the stitching machine, and for this purpose there may be a support block 6; the anvil is shown at 10 and may be secured to the supporting block by screws as shown. The anvil comprises essentially four distinct parts; there is the supporting part 11 which is secured to the supporting block; a part 12, which may be termed the shank, is advantageously disposed laterally at an angle to the supporting part 11; a curved part 13, which may be called a neck, connects the shank 12 with the end part 14 l which is the anvil. Part 14 may carry a suitable separate hardened steel clincher element 15 for direct contact with the stitch legs for turning them over as the stitch is driven again st it.

The parts 11 and 14 are essentially in diierent planes, as shown in Figs. 1 and 2, and the parts 12 or 13, or both, are inclined in such 'manner as to connect with the different iaps, and the anvil may be used in these other and various constructions; moreover, the box 35 need not necessarily be of fibre board but of any other material designed to be riveted or stitched. v

The shank 12 rejects in under the @over A and'over the dhp C; thei neck 13 forms a 90 two stitches spaced a minimum distance a art. Considering, for example, in Fig. 3

Y t at at the point X the last stitch is takenthe next adjacent stitch being at Y. The distance from X to Y may be the maximum spacing permitted between stitches, and the anvil is so shaped as shown in Fig. 3, to require no more space than this for removal. To remove the anvil it may be swung'after the manner illustrated in Fig. 4 substantially around the point X as a center, and the outer boundary line of the flap C is spaced from the point X not greater, and advantageously less, than the distance X-Y. In other words, take the point 12A on the anvil and describe an arc through the point 12A using the anvil proper 15 as a center, the outer edge of the shank 12, the neck 13 vand the anvil portion 14 lies not Without the circle and preferably Within; in other words, the radial distance from the anvil proper to the parts which are underneath the container flaps is not greater and preferably less than the' distance from the anvil to the point 12A. This might be described by saying that. radii successively drawn from the anvil portion 14 to the outside of the neck from points adjacent to 14 and successively extending to this neck outline, following this outline through portions 13, 12 ,and 12A, will each be successively longer than the preceding or, if considered from point 12A, successively to point adjacent to 14, becomes successively shorter in length. It is within the inventlon to `so shape the anvil where necessary to reduce the distance from the anvil proper 15 to substantially the point'12A thus permitting of a still closer placing of the stitches, and it will be noted by inspecting the drawing herein that this may be accomplished to some degree at least without disturbing the present formation of the remaining portion of the shank, the neck and 50 anvil. Due to the fact that there is a continuous entle slope of the shank and neck the anvi is readily swung out of position and swung into position with no abrupt parts which may catch on edges of the container parts. A still further item of structure to be notedis that the overall distance from the anvil proper to the outer edge of the neck is less than the required distance between `the stitches; accordingly, where it is desired to move theanvil out from underneath the flaps of a container at a corner, a stitch through parts A and C which extend at. right angles take is substantially illustrated by the di -V ferent positions of Fig. 4.

We claim: 1. A stitching machine comprising in combination, a portable machine having a stitcher head, means for operating it, and a handle by means of which the machine may be manipulated, a blade anvil carried by the machine comprising a laterally angularl and downwardly angularly extending shan with a gradual continuous slope adapted to lie in between container flaps, a relatively sharply reversely bent neck portion, and an anvil portion projecting from the neck portion and adapted to lie in underboth flaps, said reversely bent neck portion extending downwardly angularly, and the downwardly angularly extent of the shank and neck being substantially continuous.

2. An anvil substantially of the type described, comprising a supporting part, an anvil part, said supporting part and anvil part lying in different planes, and which planes are substantially parallel, a shank extending from the support in an angular direction, and having a relatively uniform continuous slope from the plane of the support toward the plane of the anvil, and a reversely bent neck portion connecting the anvil portion and shank, said neck portion having a slope extending vto the plane of the anvil portion and which is substantially a continuation of the slope of the shank.

In testimony whereof we aiix our signatures.

HERBERT R. BLISS. HOWARD G. ALLEN.

. to the parts in which the last stitch was taken, i A

may be relatively close to the corner, and yet 65 the neck will clear this stitch; as for ex- 

